Supporting Lync Server with DHCP

Although soft clients inherit their connectivity from the host they are connected to, specialized devices such as VoIP desk phones are likely managed centrally by the Lync Server administrator. Traditionally, these devices are configured via DHCP to allow them to connect properly and to let the device know where to look for firmware of software updates. Microsoft recommends several DHCP options for use with Communicator Phone Edition devices. These are

• Option 43—CS Pool Certificate Provisioning Service URL—Specifies the internal (Uniform Resource Locator) URL in the form https://CSWebPoolDFQDN:443/CertProv/CertProvisioningService.svc.

• Option 120—FQDN for the CA Pool Registrar—Specifies the pool fully qualified domain name for the pool that acts as the first logon server for the device, usually a Director pool.

• Option 43—VLAN ID—Allows the configuration of a Virtual Local Area Network (VLAN) ID. Do not use this if you use Link Layer Discovery Protocol (LLDP)-enabled switches for providing VLAN IDs.

• Option4—TimeServer—Points the device to a time server to keep it in sync with other systems.